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Effects of factory reset of a rooted device

Discussion in 'Android Lounge' started by kumaranil13k, Sep 28, 2021.

  1. kumaranil13k

    kumaranil13k Member
    Thread Starter

    Question : what are effects of factory reset while in rooted condition of mobile

    In my lyf water 7 mobile device having 16gb internal memory and 2 gb ram and 64gb external sd card

    I had first factory rest my mobile with and formatted my external sd card with no user apps or data installed then I decided to root it and before that want to take a backup

    I had loaded twrp recovery (fastboot boot twrprecovery.img) in bootloader mode and took NANDROID backup of system boot cache userdata through twrp backup menu and through adb pull tool all partitions backup of mmcblk0 and system boot recovery userdata and all in other partitions in devices.

    Then In twrp menu install menu I installed superuser .apk after installing succesfully I rebooted to android 5.1.1 rooted version

    Through root checker i checked the rooting status ita good

    Then I download link2sd plus modified parched .apk file which installed successfully and to open it asked to grant root permission for 15 minutes and disappeared and I tried to locate its icon in main menu or front wall but no success. I thought to uninstall but there is no mark in any settings>apps installed or running list

    I tried to find in root folders but it's hidden or disappears name there to


    I m wooried it's not any virus malware or spyware apk file which asked executed or hidden .. I thought to factory reset to erase that hidden apk file of link2sd

    My queries:-

    1. How to find and erase that hidden apk file aftermarks or settings

    2. Should I format or factory reset the mobile as su was installed or I should first unroot or clear su before factory reset will it erase that malware hidden aftermarks

    3. If I don't not remove or unroot SU and factory reset the mobile then will after factory reset I have to re root or install SU again or it will be rooted or unrooted automatically after factory reset format withing rooting
     



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  2. ocnbrze

    ocnbrze DON'T PANIC!!!!!!!!!

    did you make a nandroid backup? just restore that.

    and a factory rest may unroot depending on the method you used to root. if you use SU to gain root permission which affects system partition, then a reset will not unroot the phone. if you flashed magisk, than it is possible it might unroot the phone.

    https://www.quora.com/Will-a-rooted-Android-phone-gets-unrooted-after-a-factory-reset

    from the first post by Shane Britton:

    the other post by Noel Carson is very informative as well:
     
  3. kumaranil13k

    kumaranil13k Member
    Thread Starter

    @ocnbrze bro thanks a lot for ur reply sharing your time knowledge opinion suggestions to obliged grateful to you.

    @ocnbrze bro I don't want to unroot I just want to erase the effect of malware modified link2sd plus patched app installed which is not showing it unistaller to...and again want to root...I mean to say that if I factory reset then will it erase all aftermarks of malware spyware or bloatware any virus.....and if I factory rest then the system files again will it be rooted (will contain su roote previlages) or i have to root it again . Or install su again after flashing restoring nandroid backup.
     
  4. ocnbrze

    ocnbrze DON'T PANIC!!!!!!!!!

    Well if you read the posts....... it will depend on how you rooted will determine if you have to re- root the phone, after doing the factory reset. And yes a factory reset will erase the malware, if that is what you have.
     
  5. kumaranil13k

    kumaranil13k Member
    Thread Starter

    @ocnbrze bro yes I know magisk root by writing in boot partition and super user and other method write on system partition and twrp on recovery partition ...but kingoroot iroot one click write a bulk of files garbage files....but super user user writes minimum files ....but I foud magisk procedure little complicated it patches the boot.img and that boot image it patch is provided from 3rd party can we patch our original adb pull .../mmcblck0p24/ boot.img file self copied by. I doubt the 3rd party boot.img may not be modified so is did not used it

    @ocnbrze bro thanx for telling factory reset will erase malware spyware virus but what about after factory reset new fresh os loaded files installed will have super user booted files as super user was installed in system partition...or is should factory reset after unistalling unrooting super user...and reinstall re-root after factory reset..
    Or first recover twrp backup the nandroid backup which way should I go...
     
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